Improvement in machine foe geinding and cutting down augees



Y @getuigenis tant. @um

E, o. CARRI'NGTON VAND-EDWIN CRRI-NGTON, or WEST MERIDENyco- NEc'rIcUT.

Lam Patent-Nt. 76,301, daad April 7, 1868.

.IMPROVBMENT IN MACHINE` FOR GRIN-DING AND CUTTING DOWN AUGBRS.

.@lgirlgehirle. dirmi in in tinte-Enters ttmt v:un mating giri nt the time.

cro ALL- wnoM 1r MAY ooNoEnN'f Be it known that we, E, O OARnINeroN and EDWIN CARnINe-roN, of West Meriden, in the county of New Haven, and" State of Connecticut, have invented a new4 Improvement 2in, Apparatus for Grinding and Cutting ADown'Augers; and we do hereby declare the following, when taken in connectien with the accompanying drawf ings,'and thelettersof reference marked' thereon, vto -be-a full, clear, and enact description of the same, and which Vsaid drawings constitute part lof thisspecification, and represent, in-

Figure 1, a. topfview," i Figure 2,'.a side view, Figure', an end view, and in Figurefl detached parts.` I This inventionrelatesvto an improvement lin the machine patented'to us, July 2, 1867, That machine was simply iacutti'ng-down machine, that is to say, forming the vcutting-lip ofthe augeryand our invention Vconsists in combining a grinding-apparatus with thev cutting down,` so that ,the edge of the pod is perfectly ground to lthe proper size', and the cutting down''performed4 in the same machine.

i To'enahle others skilled in the art to construct and use'our improvement, we will proceed t`o describe the s amefas' illustrated in 'the accoinpanying drawings.

A is Vthe bedplate, supporting'in bearings, B, a grinding-cylinder, C, the said cylinder driven by theappli# cation of power thereto through the pulley D. @The surfacevoi'v the saidcylinder maybe prepared in any known manner to produce the'requiredeiiect upon the auger to be ground. E is a swinging bar, pivoted at F, so as to turn freely to or from the cylinder, and in a bearingfG-,on the said swinging'l bar, isser-ranged a mandrel, H, providedwith adog, a, to receive the screw or point of the anger, as. more clearly seen in g. 4, .the point of the auger passing between the two prongs `of the dog, and so that the two prongs will bear each upon the blankcutter edges, and so that when the saidm'andrel is caused to revolve, it will rev'olve the auger irl-connection therewith. The said mandrel hastte'd upon'it ay cam, I, of the formrequired for the Glitter ofthe auger, and inl-the rear of thebearing G is arranged an adjustable guide, J,.Aso that when thesaid cam bears against the said guide J', the bearing @swinging with the frineQmoves to orfrom the said guidepaccording to the form of the cam,` as more fully hereafter described.A v

In another bearing, L, on the swinging'ba't E, is'arran'god a'pulley, M, upon a mandrel, d, and within the said mandrel is placed a lead, f, (see fig, 'formed to receive the shank of the auger, and forced against the said shank by a'spral springwithin the mandrel, as seen Vin tig, 4. We also arrange upon the frame E arest, N, for the support of the auger P, as denoted iirgs. land 2. The spring is employed with-in the mandrel to press'the point ofthe auger into the other mandrel. The slide 'E -is arranged so as t-move transversely in gudesfR, yby means of the. lev'er S, as clearly seen lin lfig. 1 and` isA pressed forward toward the cylinder lby means of weight-s, or their equivalents, T. A lover, U, attached to the frame, serves, to tip the franiefromthe cylinder, and adjusting-screws,'t, regulate the distance to which the frame'may be tipped;

The auger is 'inserted into its position as seen `ilfrigs. 1 and 2, and causedto -revolve by the application of power tolftlie pulley M or to the other mandrel, and borne against the revolving cylinder C, and the surface of the pod is grounddown to as neurthev cutter 'as the pod is made of an equal diameter, and continues to so revolve again-st the 1cutter until the podisof the proper diameter and its edge finished, then slide the frame to the right, so as to 'bring the cutter part to the frantoi' the cylinder,- and this operation'brings thecam I into contactwhih the 'guide J, andthe auger continuing 'itsrevolvingg tli'e cutter is brought to the forni denoted by the'cam in likemanner as the cuttcrwas redu'oed in our patentV before referred to.

The adjustmentoi" the machine for different-sized angers will be readily understood by'those acquainted 4'with the usel of similar machines,

' Having thus fully described our invention, what we'claim asnew and useful, and desire to secure by lietd ters Patent, is

The arrangement off the swinging bar E, carrying one mandrel, H, and thelother mandrel, (l, the said man- 76,301 i i A drel dI provided witha. self-adjusting heaj',;-a nd combined with th grindingfejlinder, "thewhole operating in the manner substantially as set forth. v A A w .'E. 0. -CA-RRINGTON,

` EDWIN CARRINGTON..

Witnesses:

- Joan H. BAmo, I. BAG-mmm 

